CN102997614A - Small helium liquefying device - Google Patents
Small helium liquefying device Download PDFInfo
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- CN102997614A CN102997614A CN2012105109124A CN201210510912A CN102997614A CN 102997614 A CN102997614 A CN 102997614A CN 2012105109124 A CN2012105109124 A CN 2012105109124A CN 201210510912 A CN201210510912 A CN 201210510912A CN 102997614 A CN102997614 A CN 102997614A
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- cold head
- liquid helium
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Abstract
The invention discloses a small helium liquefying device which comprises a low temperature Dewar flask. The low temperature Dewar flask is internally provided with a liquid helium confluence tank. The device further comprises a refrigerator. The first- and second-level cold heads of the refrigerator extend into the low temperature Dewar flask, and the bottom end of the second-level cold head extends into the liquid helium confluence tank. A first-level cold head heat exchanger is installed outside the first-level cold head, and a second-level cold head heat exchanger is installed outside the second-level cold head. A re-liquefying condenser is installed at the bottom end of the second-level cold head. A gas inlet tube is further installed at the top of the low temperature Dewar flask, and the gas inlet tube is connected with the inlet of the first-level cold head heat changer. Gas enters into the re-liquefying condenser through the first-level cold head heat changer and the second first-level cold head heat changer. A liquid outlet tube is further installed at the top of the low temperature Dewar flask, and a liquid outlet is arranged on the inner wall of the liquid helium confluence tank on the lower part of the liquid outlet tube. The small helium liquefying device provided by the invention is light in weight, small in size, and convenient to move and convey, and suitable for use in medium- and small-size laboratories with small use level of liquid helium.
Description
Technical field
The present invention relates to liquid helium process units field, be specially a kind of small-sized helium liquefaction device.
Background technology
Helium is a kind of expensive strategic materials, simultaneously also is the most a kind of gas of difficult liquefaction of nature.Under the normal pressure, the boiling temperature of liquid helium is very low, only has 4.2K.At present, a lot of helium liquefiers are arranged both at home and abroad, the liquid helium daily output rises to several hectolitres and does not wait from several.The device of general this production liquid helium is usually huger, and operating cost is also higher, is not suitable for middle-size and small-size occasion and uses.
Summary of the invention
The purpose of this invention is to provide a kind of small-sized helium liquefaction device, be not suitable for the problem that middle-size and small-size occasion is used to solve the prior art helium liquefier.
In order to achieve the above object, the technical solution adopted in the present invention is:
Small-sized helium liquefaction device, include cooled cryostat, be provided with the liquid helium tank that confluxes in the cooled cryostat, it is characterized in that: also comprise refrigeration machine, described refrigeration machine has the one-level cold head and is connected to the secondary cold head of one-level cold head lower end, the one-level of described refrigeration machine, the secondary cold head stretches into the cooled cryostat from cooled cryostat crown center position, and secondary cold head bottom is stretched into liquid helium and is confluxed the tank from the liquid helium tank top of confluxing, wherein the one-level cold head is equipped with the one-level cold header heat exchanger outward, the secondary cold head is equipped with the secondary cold header heat exchanger outward, secondary cold head bottom is equipped with and is suspended from conflux the again liquefaction condenser of tank inner cavity top of liquid helium, described cooled cryostat top also is equipped with air inlet pipe, described air inlet pipe bottom is passed the one-level cold header heat exchanger successively, stretch into the liquid helium tank inner cavity top that confluxes behind the secondary cold header heat exchanger, described cooled cryostat is equipped with drain pipe, and the drain pipe bottom is positioned at liquid helium and confluxes and have liquid outlet on the tube wall of tank.
Described small-sized helium liquefaction device is characterized in that: described cooled cryostat bottom is equipped with Moving caster.
Liquid collecting helium of the present invention production and memory function are integrated, and liquid helium output can reach 10 liters/day, and the device quality is light, volume is little, are convenient to mobile and transportation, are suitable for the little middle-size and small-size laboratory occasion of liquid helium consumption and use.
Description of drawings
Fig. 1 is structure side cutaway view of the present invention.
Fig. 2 is structure top view of the present invention.
The specific embodiment
As shown in Figure 1 and Figure 2.Small-sized helium liquefaction device, include cooled cryostat 6, be provided with the liquid helium tank 5 that confluxes in the cooled cryostat 6, also comprise refrigeration machine, refrigeration machine has one-level cold head 1 and is connected to the secondary cold head 8 of one-level cold head lower end, the one-level 1 of refrigeration machine, secondary cold head 8 stretches into the cooled cryostat 6 from cooled cryostat 6 crown center positions, and secondary cold head 8 bottoms are stretched into liquid helium and are confluxed the tank 5 from liquid helium tank 5 tops of confluxing, wherein outside the one-level cold head 1 one-level cold header heat exchanger 2 is installed, the secondary cold head 8 outer secondary cold header heat exchangers 3 that are equipped with, secondary cold head 8 bottoms are equipped with and are suspended from conflux the again liquefaction condenser 4 of tank 5 inner cavity tops of liquid helium, cooled cryostat 6 tops also are equipped with air inlet pipe 10, air inlet pipe 10 bottoms connect the import of one-level cold header heat exchanger 2, the gas one-level cold header heat exchanger 2 of flowing through successively, enter the condenser 4 that liquefies again behind the secondary cold header heat exchanger 3.Cooled cryostat 6 tops also are equipped with drain pipe 9, and drain pipe 9 bottoms are positioned at liquid helium and conflux and have liquid outlet on the tube wall of tank 5.Cooled cryostat 6 bottoms are equipped with Moving caster 7.
The present invention adopts 4.2K twin-stage Cryo Refrigerator as low-temperature receiver, and the high-purity helium of normal temperature is as unstripped gas.After helium enters air inlet pipe, at first be cooled to 40 ~ 60K warm area by the one-level cold header heat exchanger, continued to flow to the cooling of secondary cold header heat exchanger by the helium after the precooling, finally entering liquid helium confluxes in the tank, and be sprayed onto on the condenser that liquefies again, the condenser that liquefied again liquefaction forms drop and splashes into liquid helium and conflux in the tank.Helium successively replenishes, and liquid helium is just continuously produced, and the liquid helium that the liquid helium of production directly leaves cooled cryostat in confluxes in the tank.The liquid helium that confluxes in the tank can be discharged by drain pipe, is delivered to miscellaneous equipment and stores or use.The present invention can promote cooled cryostat by Moving caster, changes placement location, and castor locks behind the location with retaining mechanism.Used device funds of the present invention are few, produce liquid helium cycle weak point, are fit to the little occasion of liquid helium consumption, units such as laboratory, military project, scientific research.
Claims (2)
1. small-sized helium liquefaction device, include cooled cryostat, be provided with the liquid helium tank that confluxes in the cooled cryostat, it is characterized in that: also comprise refrigeration machine, described refrigeration machine has the one-level cold head and is connected to the secondary cold head of one-level cold head lower end, the one-level of described refrigeration machine, the secondary cold head stretches into the cooled cryostat from cooled cryostat crown center position, and secondary cold head bottom is stretched into liquid helium and is confluxed the tank from the liquid helium tank top of confluxing, wherein the one-level cold head is equipped with the one-level cold header heat exchanger outward, the secondary cold head is equipped with the secondary cold header heat exchanger outward, secondary cold head bottom is equipped with and is suspended from conflux the again liquefaction condenser of tank inner cavity top of liquid helium, described cooled cryostat top also is equipped with air inlet pipe, described air inlet pipe bottom is passed the one-level cold header heat exchanger successively, stretch into the liquid helium tank inner cavity top that confluxes behind the secondary cold header heat exchanger, described cooled cryostat is equipped with drain pipe, and the drain pipe bottom is positioned at liquid helium and confluxes and have liquid outlet on the tube wall of tank.
2. small-sized helium liquefaction device according to claim 1 is characterized in that: Moving caster is installed bottom the described cooled cryostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105109124A CN102997614A (en) | 2012-12-04 | 2012-12-04 | Small helium liquefying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105109124A CN102997614A (en) | 2012-12-04 | 2012-12-04 | Small helium liquefying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102997614A true CN102997614A (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105109124A Pending CN102997614A (en) | 2012-12-04 | 2012-12-04 | Small helium liquefying device |
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| CN (1) | CN102997614A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944802A (en) * | 2021-04-15 | 2021-06-11 | 西南石油大学 | Precooling apparatus before filling liquid helium storage tank |
| CN115682629A (en) * | 2022-09-27 | 2023-02-03 | 华中科技大学 | External hanging type small helium liquefier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841732A (en) * | 1987-12-28 | 1989-06-27 | Sarcia Domenico S | System and apparatus for producing and storing liquid gases |
| JPH0271085A (en) * | 1988-09-07 | 1990-03-09 | Hitachi Ltd | Liquid nitrogen generator |
| US6212904B1 (en) * | 1999-11-01 | 2001-04-10 | In-X Corporation | Liquid oxygen production |
| WO2011139989A2 (en) * | 2010-05-03 | 2011-11-10 | Consejo Superior De Investigaciones Científicas (Csic) | Gas liquefaction system and method |
| CN203024534U (en) * | 2012-12-04 | 2013-06-26 | 安徽万瑞冷电科技有限公司 | Small helium liquefaction device |
-
2012
- 2012-12-04 CN CN2012105109124A patent/CN102997614A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841732A (en) * | 1987-12-28 | 1989-06-27 | Sarcia Domenico S | System and apparatus for producing and storing liquid gases |
| JPH0271085A (en) * | 1988-09-07 | 1990-03-09 | Hitachi Ltd | Liquid nitrogen generator |
| US6212904B1 (en) * | 1999-11-01 | 2001-04-10 | In-X Corporation | Liquid oxygen production |
| WO2011139989A2 (en) * | 2010-05-03 | 2011-11-10 | Consejo Superior De Investigaciones Científicas (Csic) | Gas liquefaction system and method |
| CN203024534U (en) * | 2012-12-04 | 2013-06-26 | 安徽万瑞冷电科技有限公司 | Small helium liquefaction device |
Non-Patent Citations (1)
| Title |
|---|
| 徐冬: "《4K G-M制冷机做冷源的自循环氦液化装置研制》", 《低温工程》, no. 1, 28 February 2010 (2010-02-28) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944802A (en) * | 2021-04-15 | 2021-06-11 | 西南石油大学 | Precooling apparatus before filling liquid helium storage tank |
| CN115682629A (en) * | 2022-09-27 | 2023-02-03 | 华中科技大学 | External hanging type small helium liquefier |
| CN115682629B (en) * | 2022-09-27 | 2024-04-19 | 华中科技大学 | Externally-hung small helium liquefier |
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Application publication date: 20130327 |